Finished Unit 5 Homework

Author: Thesnowmanndev

Java Programming Principles 2/Homework/5. Unit Five/1. Find the Errors Ch 16/QuestionOne.sql

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+/* 
+ This program was written by Kyle Martin on 8/7/2021 for Java Programming Principles 2 during Summer Session 2
+ at Southwestern College, Kansas.
+ 
+ IMPORTANT: Normally I would not place a bunch of comments in my code describing what my code is doing as I like to
+ have code that is written in a manner to be understandable while reading it. Though, do to the grading rubric I will
+ explain my code.
+ 
+ This program was created to fix sudo code.
+ See Chapter 16 Review Questions - Find the Error Question 1
+ */
+SELECT * FROM Coffee WHERE Description = 'French Roast Dark' 
+-- Changed double quotes to single quotes

Java Programming Principles 2/Homework/5. Unit Five/1. Find the Errors Ch 16/QuestionThree.java

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+/* 
+ This program was written by Kyle Martin on 8/7/2021 for Java Programming Principles 2 during Summer Session 2
+ at Southwestern College, Kansas.
+ 
+ IMPORTANT: Normally I would not place a bunch of comments in my code describing what my code is doing as I like to
+ have code that is written in a manner to be understandable while reading it. Though, do to the grading rubric I will
+ explain my code.
+ 
+ This program was created to fix sudo code.
+ See Chapter 16 Review Questions - Find the Error Question 2 
+ */
+String sql = "SELECT * FROM Coffee";
+Statement stmt = conn.createStatement();
+ResultSet result = stmt.executeQuery(sql); //Added Query to execute command
+ 

Java Programming Principles 2/Homework/5. Unit Five/1. Find the Errors Ch 16/QuestionTwo.sql

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+/* 
+ This program was written by Kyle Martin on 8/7/2021 for Java Programming Principles 2 during Summer Session 2
+ at Southwestern College, Kansas.
+ 
+ IMPORTANT: Normally I would not place a bunch of comments in my code describing what my code is doing as I like to
+ have code that is written in a manner to be understandable while reading it. Though, do to the grading rubric I will
+ explain my code.
+ 
+ This program was created to fix sudo code.
+ See Chapter 16 Review Questions - Find the Error Question 2
+ */
+SELECT * FROM Coffee WHERE ProdNum != 14-001
+-- Got rid of quotes as it seems to be a number not a string

Java Programming Principles 2/Homework/5. Unit Five/2. Algorithm Workbench Ch 16/ExceriseTwo.sql

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+/* 
+ This program was written by Kyle Martin on 8/7/2021 for Java Programming Principles 2 during Summer Session 2
+ at Southwestern College, Kansas.
+ 
+ IMPORTANT: Normally I would not place a bunch of comments in my code describing what my code is doing as I like to
+ have code that is written in a manner to be understandable while reading it. Though, do to the grading rubric I will
+ explain my code.
+ 
+ This file was created to answer questions from the Algorithm Workbench portion of Ch. 16
+ See Chapter 16 Algorithm Workbench - Exercise Two
+ */
+
+/* 
+Look at the following SQL statement:
+SELECT Name FROM Employee
+
+What is the name of the table from which this statement is retrieving data?
+Answer: Employee
+
+What is the name of the column that is being retrieved?
+Answer: Name
+ */

Java Programming Principles 2/Homework/5. Unit Five/2. Algorithm Workbench Ch 16/ExerciseOne.sql

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+/* 
+ This program was written by Kyle Martin on 8/7/2021 for Java Programming Principles 2 during Summer Session 2
+ at Southwestern College, Kansas.
+ 
+ IMPORTANT: Normally I would not place a bunch of comments in my code describing what my code is doing as I like to
+ have code that is written in a manner to be understandable while reading it. Though, do to the grading rubric I will
+ explain my code.
+ 
+ This file was created to answer questions from the Algorithm Workbench portion of Ch. 16
+ See Chapter 16 Algorithm Workbench - Exercise One
+ */
+
+/* 
+What SQL data types correspond with the following Java types?
+int
+float
+String
+double
+ */
+
+--  Answers:
+/* 
+int = INTEGER or INT
+float = REAL
+String = CHARACTER or CHAR or VARCHAR
+double = DOUBLE
+ */

Java Programming Principles 2/Homework/5. Unit Five/2. Algorithm Workbench Ch 16/ExerciseThree.sql

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+/* 
+ This program was written by Kyle Martin on 8/7/2021 for Java Programming Principles 2 during Summer Session 2
+ at Southwestern College, Kansas.
+ 
+ IMPORTANT: Normally I would not place a bunch of comments in my code describing what my code is doing as I like to
+ have code that is written in a manner to be understandable while reading it. Though, do to the grading rubric I will
+ explain my code.
+ 
+ This file was created to answer questions from the Algorithm Workbench portion of Ch. 16
+ See Chapter 16 Algorithm Workbench - Exercise Three
+ */
+
+ SELECT * FROM STOCK

Java Programming Principles 2/Homework/5. Unit Five/3. Programming Challenges Ch 16/1. Unpaid Order Sum/src/Output.jpg

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+/*
+ * This program was written by Kyle Martin on 8/7/2021 for Java Programming Principles 2 during Summer Session 2
+ * at Southwestern College, Kansas.
+ *
+ * IMPORTANT: Normally I would not place a bunch of comments in my code describing what my code is doing as I like to
+ * have code that is written in a manner to be understandable while reading it. Though, do to the grading rubric I will
+ * explain my code.
+ *
+ * This program was created to sum a total from a database
+ * See Chapter 16 Programming Challenges  - Challenge Three.
+ */
+import java.sql.*;
+
+public class UnpaidOrderCost {
+    public static void main(String[] args) {
+        String DB_URL = "jdbc:mysql://localhost:3306/CoffeeDB";
+        String DB_USER = "root";
+        String DB_Pass = "password"; //Actual password changed, also hard coding secrets isn't a good idea
+
+        try {
+            Connection DBConnection;
+            DBConnection = DriverManager.getConnection(DB_URL, DB_USER, DB_Pass);
+            Statement DBStatement = DBConnection.createStatement();
+
+            String DBCommand = "SELECT SUM(Cost) FROM UnpaidOrder";
+            ResultSet result = DBStatement.executeQuery(DBCommand);
+
+            if (result.next())
+                System.out.println("Total Cost = " + result.getDouble(1));
+
+            DBStatement.close();
+            DBConnection.close();
+        } catch (SQLException throwables) {
+            throwables.printStackTrace();
+            System.out.println("Error:" + throwables.getMessage());
+        }
+    }
+}

Java Programming Principles 2/Homework/5. Unit Five/3. Programming Challenges Ch 16/1. Unpaid Order Sum/src/UnpaidOrderCost.java

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+/*
+ * This program was written by Kyle Martin on 8/7/2021 for Java Programming Principles 2 during Summer Session 2
+ * at Southwestern College, Kansas.
+ *
+ * IMPORTANT: Normally I would not place a bunch of comments in my code describing what my code is doing as I like to
+ * have code that is written in a manner to be understandable while reading it. Though, do to the grading rubric I will
+ * explain my code.
+ *
+ * This program was created to provide querys from a dropdown and then execute them and see the results
+ * See Chapter 16 Programming Challenges  - Challenge Four.
+ */
+
+import javafx.application.Application;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import javafx.scene.control.ComboBox;
+import javafx.stage.Stage;
+import javafx.scene.Scene;
+import javafx.scene.control.TextArea;
+import javafx.scene.control.Button;
+import javafx.scene.layout.VBox;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.event.EventHandler;
+import javafx.event.ActionEvent;
+import java.sql.*;
+
+public class DBViewer extends Application
+{
+   final String DB_URL = "jdbc:mysql://localhost:3306/CityDB"; // Don't Hardcode Secrets
+   final String DB_USER = "root"; // Don't Hardcode Secrets
+   final String DB_Pass = "password"; // Don't Hardcode Secrets
+
+   TextArea queryTextArea;
+   TextArea resultsTextArea;
+   ComboBox comboBox;
+      
+   public static void main(String[] args)
+   {
+      launch(args);
+   }
+   
+   @Override
+   public void start(Stage primaryStage)
+   {
+      final int COL_SIZE = 50;
+      final int ROW_SIZE = 10;
+      final double SPACING = 10.0;
+
+      String populationAscending = "SELECT * FROM City ORDER BY Population ASC";
+      String populationDescending = "SELECT * FROM City ORDER BY Population DESC";
+      String sortCityNames = "SELECT CityName FROM City ORDER BY CityName ASC";
+      String totalPopulation = "SELECT SUM(Population) FROM City";
+      String avgPopulation = "SELECT AVG(Population) FROM City";
+      String highestPopulation = "SELECT MAX(Population) FROM City";
+      String lowestPopulation = "SELECT MIN(Population) FROM City";
+
+      ObservableList<String> queryOptions =
+              FXCollections.observableArrayList(populationAscending,
+                                                      populationDescending,
+                                                      sortCityNames,
+                                                      totalPopulation,
+                                                      avgPopulation,
+                                                      highestPopulation,
+                                                      lowestPopulation);
+      comboBox = new ComboBox(queryOptions);
+      
+      // Build the query results area.
+      resultsTextArea = new TextArea();
+      resultsTextArea.setPrefColumnCount(COL_SIZE);
+      resultsTextArea.setPrefRowCount(ROW_SIZE);
+      
+      // Create the Submit button.
+      Button submitButton = new Button("Submit");
+      submitButton.setOnAction(new SubmitButtonHandler());
+      
+      // Put the controls in a VBox.
+      VBox vbox = new VBox(SPACING, comboBox,
+                           submitButton, resultsTextArea);
+      vbox.setAlignment(Pos.CENTER);
+      vbox.setPadding(new Insets(SPACING));
+
+      primaryStage.setTitle("Population Database - Kyle Martin");
+
+      Scene scene = new Scene(vbox);
+      primaryStage.setScene(scene);
+
+      primaryStage.show();
+   }
+
+   /**
+    * Event handler class for submitButton
+    */
+ 
+   class SubmitButtonHandler implements EventHandler<ActionEvent>
+   {
+      @Override
+      public void handle(ActionEvent event)
+      {
+         try
+         {
+            resultsTextArea.setText("");
+
+            Connection conn = DriverManager.getConnection(DB_URL, DB_USER, DB_Pass);
+            Statement stmt = conn.createStatement();
+
+            ResultSet resultSet = 
+                    stmt.executeQuery(comboBox.getValue().toString());
+
+            ResultSetMetaData meta = resultSet.getMetaData();
+
+            String output = "";
+
+            while (resultSet.next())
+            {
+               for (int i = 1; i <= meta.getColumnCount(); i++)
+               {
+                  output += resultSet.getString(i);
+                  output += '\t';
+               }
+               output += '\n';
+            }
+
+            resultsTextArea.setText(output);
+
+            stmt.close();
+            conn.close();
+ 
+         }
+         catch (SQLException e)
+         {
+            e.printStackTrace();
+            System.exit(0);
+         }
+      }
+   }
+}